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5-day forecast / Van Alstyne, TX

TodayShowers And Thunderstorms Likely0° / 76° 63%
TuesdayChance Showers And Thunderstorms91° / 77° 37%
WednesdayMostly Sunny93° / 76° 4%
ThursdaySunny94° / 77° 7%
FridayMostly Sunny95° / 77° 1%

Dangerous Heat and Humidity Grip Van Alstyne as Storms Loom

Van Alstyne weather, updated every four hours — local forecasts you can trust.

Van Alstyne residents face oppressive heat with a feels-like temperature of 105F today. Scattered showers and thunderstorms are expected to develop, bringing relief from the humidity but posing safety risks due to the extreme heat index.

Marlene Ortiz

June 22, 20262 min read

National Weather Service radar for North Texas (KFWS)
National Weather Service radar for North Texas (KFWS)

Extreme Heat and Humidity Conditions

Van Alstyne is currently under the influence of dangerous heat and oppressive humidity. The air temperature stands at 91F, but the heat index makes it feel like 105F. This significant disparity is driven by a dew point of 77F and a relative humidity of 63%, creating a muggy atmosphere that can quickly lead to heat-related illnesses. Winds are currently blowing from the south southeast at 8 mph, with gusts reaching 6 mph, offering little relief from the stagnant, hot air. The sky remains mostly clear, allowing the sun to intensify the heat throughout the afternoon.

Forecast for Today and Tomorrow

Today, the heat will persist with a high near 90F. The National Weather Service indicates a high chance of showers and thunderstorms, with precipitation chances at 43%. While rain may offer temporary relief, new rainfall amounts are expected to be less than a tenth of an inch. Heat index values could reach as high as 103F during the day. Winds will shift to the south southeast around 10 mph.

Tonight, conditions will become mostly cloudy with a low around 76F. The chance of precipitation increases to 60%, with showers and thunderstorms likely between 7pm and 4am. Earlier in the evening, before 7pm, there is a chance for these storms. Heat index values may climb to 102F. Residents can expect new rainfall amounts between a quarter and half of an inch. Winds will ease to the east southeast at 5 to 10 mph.

Tomorrow, the heat will continue with a high near 91F. Partly sunny skies are expected, with a chance of showers and thunderstorms before 1pm. The precipitation chance is 40%, with potential rainfall between a tenth and a quarter of an inch. Heat index values will be as high as 100F. Winds will be from the south at 5 to 10 mph. Tomorrow night, skies will clear to mostly clear with a low around 77F and heat index values near 100F.

Safety Reminders

Given the dangerous heat index values exceeding 100F, it is critical to stay hydrated and limit midday exertion. Seek air-conditioned environments when possible and check on elderly neighbors or those without adequate cooling. While storms are expected, the primary threat remains the extreme heat. There are no active weather alerts at this time, but vigilance is advised.

National Weather Service radar for North Texas (KFWS)
National Weather Service radar for North Texas (KFWS)

Sources

https://radar.weather.gov

https://api.weather.gov

https://open-meteo.com

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Marlene Ortiz

Marlene Ortiz covers weather, storms, and seasonal life across Van Alstyne and Grayson County.

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